Sun Cluster 3.0 HA for NFS Restrictions

• No Sun Cluster node may be an NFS client of a Sun Cluster HA for NFS‐exported file system being mastered on a node in the same cluster. Such cross-mounting of Sun Cluster HA for NFS is prohibited. Use the cluster file system to share files among cluster nodes.

• Applications running locally on the cluster must not lock files on a file system exported via NFS. Otherwise, local blocking (for example, flock(3UCB) or fcntl(2)) might interfere with the ability to restart the lock manager (lockd). During restart, a blocked local process may be granted a lock which may be intended to be reclaimed by a remote client. This would cause unpredictable behavior.

• Sun Cluster HA for NFS requires that all NFS client mounts be “hard” mounts.

• For Sun Cluster HA for NFS, do not use hostname aliases for network resources. NFS clients mounting cluster file systems using hostname aliases might experience statd lock recovery problems.

• Sun Cluster 3.0 software does not support Secure NFS or the use of Kerberos with NFS, in particular, the secure and kerberos options to the share_nfs(1M) subsystem. However, Sun Cluster 3.0 software does support the use of secure ports for NFS by adding the entry set nfssrv:nfs_portmon=1 to the /etc/system file on cluster nodes.